eli5: what are the factors that affect ocean water clarity? Some days the ocean will be incredibly clear and the next day at the same location the water will be murky and green, why is this?

Question

I read somewhere that oxygen levels in the water and tides have an effect. Obviously I understand that wind and waves will stir up sediment but I feel there’s more factors at play. Curious if anyone knows.

In: 5

Answer 1

Certain combinations of temperature and oxygen saturation can cause sponteneous algae blooms.

Herring and other bait fish often spawn vast swathes of eggs that clog bays and shorelines.

As well, changing river flow volumes can shift sediment outflow patterns where rivers meet the sea.

Finally, foul weather and heavy seas can stir up sediment in shallow water.